Beryl is famous for its perfect, six-sided crystals. Crystals are prismatichexagons, and usually occur individually. Crystals may be enormous. Some 30 foot long (about 8 meters), well-crystallized examples are known to exist.Also occurs in short, stubby crystals, and occasionally in tabular crystals and plates. Crystals are usually not terminated, and their bases are either flat or damaged. Even when terminated, they are rarely fully terminated like a bipyramidal hexagon.Also occurs in columnar aggregates and massive. Only rarely found in drusy or platy aggregates and as bundles of thin, long crystals.Crystals are usually striated lengthwise with very fine striations.